Question

5. Resolva as equações
a) 3 (x-5) = 2 (x+6)
b) 2 (x+3) = 3 (x-7)
c) 4 (x-5) = 3 (x+2)
d) 5 (x-6) = 4 (x+5)

Answer 1

3x(x-5)=2(x+6)
3x-5 = 2x+12
3x-2x=12+5
1x=17
x 17/1 =17

Answer 2

a] 3(x-5) = 2(x+6)

   3x - 15 = 2x + 12

   3x - 2x = 12 + 15

    x = 27

b] 2(x+3) = 3(x-7)

   2x + 6 = 3x - 21

   2x - 3x = -21 - 6

   -x = -27     .(-1)

   x = 27

c] 4(x-5) = 3(x+2)

   4x - 20 = 3x + 6

   4x - 3x = 6 + 20

    x = 26

d] 5(x-6) = 4(x+5)

  5x - 30 = 4x + 20

  5x - 4x = 20 + 30

  x = 50